Mods of Skyrim on the Xbox 360 version. Used with a USB. ----READ BELOW----
My friend did the mods for me, I don't know how, but I will put what I know.
To do these mods, you must use Modio. You can download it at gametuts.com or just click this link: http://www.game-tuts.com/community/modio.php
I have no idea how to use modio really, but if you look up a tutorial it can tell you how to do it. I know it involves using a USB to transfer your xbox live profile into Modio. That is all I know. You also MUST create a gametuts account to use Modio.